Determine which reactants are amphoteric and amphiprotic:
HCO₃− + HBr ⇌ H₂CO₃ + Br−
3 HCl + Al(OH)₃ ⇌ AlCl₃ + 3 H₂O
2 HBr + ZnO ⇌ ZnBr₂ + H₂O

a) 1 and 2
b) 2 and 3
c) 1 and 3
d) All